Report: 49ers' Mike Iupati had shoulder surgery, to miss OTAs

On the same day a report surfaced about All-Pro left guard Mike Iupati likely to miss some offseason workouts, the 49ers confirmed the signings of 12 undrafted free agents.

Iupati had a shoulder surgery performed since the season ended, and he is expected to miss the upcoming organized team activities, according to a Sacramento Bee report on Tuesday.

Iupati started every game for the 49ers last season, including three postseason contests. Toward the end of the regular season, he appeared on the team's injury report.

The report said the extent of Iupati's injury is unknown and that he is expected back at full strength in time for the 49ers training camp in late July. Iupati underwent shoulder surgery after the 2007 season, when he was at the University of Idaho.

San Francisco 49ers offensive lineman Mike Iupati sits on the sideline during the first quarter of his team's NFC Championship playoff football game against the Atlanta Falcons on Sunday, Jan. 20, 2013 at the Georgia Dome in Atlanta. (Jim Gensheimer/Bay Area News Group)

Recently signed guard Adam Snyder is a likely candidate to fill in for Iupati during his absence. Joe Looney and Daniel Kilgore also are capable of playing guard.

In other news, the 49ers signed punter Anthony Santella to a one-year contract and added 12 undrafted free agents: